Photocatalytic activity of Ca3Ti2O7 layered-perovskite doped with Rh under visible light irradiation

Yoshihiro Okazaki; Takahiro Mishima; Shunsuke Nishimoto; Motohide Matsuda; Michihiro Miyake

doi:10.1016/j.matlet.2008.02.052

Photocatalytic activity of Ca₃Ti₂O₇ layered-perovskite doped with Rh under visible light irradiation

Yoshihiro Okazaki, Takahiro Mishima, Shunsuke Nishimoto, Motohide Matsuda, Michihiro Miyake

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

The photocatalytic activities of layered-perovskite Ca₃Ti₂O₇ doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca₃Ti₂O₇ as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H₂ evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca₃Ti₂O₇ after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca₃Ti_{2 - x}Rh_xO₇, showed higher stability in air than CaTi_{1 - x}Rh_xO₃, which consists of a simple perovskite structure.

Original language	English
Pages (from-to)	3337-3340
Number of pages	4
Journal	Materials Letters
Volume	62
Issue number	19
DOIs	https://doi.org/10.1016/j.matlet.2008.02.052
Publication status	Published - Jul 15 2008

Keywords

Catalysts
Perovskites
Photochemical technology
Rh-doping
Visible light response

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.1016/j.matlet.2008.02.052

Cite this

@article{751f49ca509847e199cff5df103cfe49,

title = "Photocatalytic activity of Ca3Ti2O7 layered-perovskite doped with Rh under visible light irradiation",

abstract = "The photocatalytic activities of layered-perovskite Ca3Ti2O7 doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca3Ti2O7 as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H2 evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca3Ti2O7 after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca3Ti2 - xRhxO7, showed higher stability in air than CaTi1 - xRhxO3, which consists of a simple perovskite structure.",

keywords = "Catalysts, Perovskites, Photochemical technology, Rh-doping, Visible light response",

author = "Yoshihiro Okazaki and Takahiro Mishima and Shunsuke Nishimoto and Motohide Matsuda and Michihiro Miyake",

note = "Funding Information: This work was partly supported by The Okayama University 21st Century COE Program “Strategic Solid Waste Management of Sustainable Society.”",

year = "2008",

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doi = "10.1016/j.matlet.2008.02.052",

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T1 - Photocatalytic activity of Ca3Ti2O7 layered-perovskite doped with Rh under visible light irradiation

AU - Okazaki, Yoshihiro

AU - Mishima, Takahiro

AU - Nishimoto, Shunsuke

AU - Matsuda, Motohide

AU - Miyake, Michihiro

N1 - Funding Information: This work was partly supported by The Okayama University 21st Century COE Program “Strategic Solid Waste Management of Sustainable Society.”

PY - 2008/7/15

Y1 - 2008/7/15

N2 - The photocatalytic activities of layered-perovskite Ca3Ti2O7 doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca3Ti2O7 as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H2 evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca3Ti2O7 after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca3Ti2 - xRhxO7, showed higher stability in air than CaTi1 - xRhxO3, which consists of a simple perovskite structure.

AB - The photocatalytic activities of layered-perovskite Ca3Ti2O7 doped with Rh were investigated with visible light irradiation. Although the Rh-doped Ca3Ti2O7 as prepared showed low activity after an induction period, the photocatalytic activity was highly enhanced by treating the samples in reducing atmosphere without the need for an induction period. The rate of H2 evolution from an aqueous methanol solution by 3 mol% Rh-doped Ca3Ti2O7 after the reduction treatment was about 5 times higher than that before the reduction. The layered photocatalytic compounds, Ca3Ti2 - xRhxO7, showed higher stability in air than CaTi1 - xRhxO3, which consists of a simple perovskite structure.

KW - Catalysts

KW - Perovskites

KW - Photochemical technology

KW - Rh-doping

KW - Visible light response

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